JP7492007B2 - Battery, power consumption device, and battery manufacturing method and device - Google Patents

Description

This application relates to the technical field of batteries, and in particular to batteries, power consuming devices, and methods and devices for manufacturing batteries.

Energy saving and emission reduction are key points for the sustainable development of the automotive industry. In this case, electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of being energy-saving and environmentally friendly. For electric vehicles, battery technology is a key element of their development.

In the development of battery technology, in addition to improvements in battery performance, safety issues cannot be ignored. If the safety of a battery cannot be ensured, the battery cannot be used. Therefore, how to improve battery safety is a technical problem that must be solved in battery technology.

The present application provides a battery, a power consumption device, and a method and device for manufacturing a battery, which can improve the safety of the battery.

In a first aspect, a battery is provided, the battery cell being provided with a pressure relief mechanism, the pressure relief mechanism being used to release the internal pressure of the battery cell by activating when the internal pressure or temperature of the battery cell reaches a threshold value, a bus bar for electrically connecting to the battery cell, an electrical cavity for accommodating the battery cell and the bus bar, a collection cavity for collecting emissions from the battery cell when the pressure relief mechanism is activated, and a seal structure provided in an airflow passage formed between the pressure relief mechanism and a wall of the electrical cavity for preventing the emissions from reaching the bus bar when the pressure relief mechanism is activated.

By providing a sealing structure in the airflow passage formed between the pressure relief mechanism and the wall of the electrical cavity, exhaust from the battery cells can be stopped from entering the electrical cavity when the pressure relief mechanism is activated, reducing the risk of insulation protection trouble and reducing the possibility of high voltage ignition, thereby improving the safety of the battery. The presence of the sealing structure can also prevent the concentration of high-temperature particulate matter in high-risk areas, reducing the possibility of trouble modes caused by localized temperature rise.

In a possible embodiment, the sealing structure is disposed around at least the outer periphery of the pressure relief mechanism to prevent the emissions from reaching the busbar when the pressure relief mechanism is activated.

In a possible embodiment, the battery further includes an isolation member for isolating the electrical cavity and the collection cavity, and the isolation member is configured as a wall shared by the electrical cavity and the collection cavity.

The isolating member is used to separate the electrical cavity that houses the battery cells from the collecting cavity that collects the exhaust, and when the pressure relief mechanism is activated, the exhaust from the battery cells enters the collecting cavity, but does not enter the electrical cavity, or enters the electrical cavity in a small amount, thereby preventing a short circuit caused by insulation protection problems in the electrical cavity, and thus improving the safety of the battery. At the same time, the exhaust generated after the battery cells go out of control is discharged into the collecting cavity, and then discharged outside the battery through the pressure relief area, thereby extending the exhaust discharge path, which can effectively lower the temperature of the exhaust and reduce the impact of the exhaust on the external environment of the battery, thereby further improving the safety of the battery.

In a possible embodiment, the pressure relief mechanism is installed on a first wall of the battery cell, the sealing structure includes a first sealing member installed between the first wall and the isolating member, the first sealing member has a through hole at a position corresponding to the pressure relief mechanism, and when the pressure relief mechanism is activated, the discharged material passes through the through hole, passes through the isolating member, and enters the collection cavity.

A first sealing member is installed on the outer periphery of the pressure relief mechanism, and the first sealing member has a through hole at a position corresponding to the pressure relief mechanism, so that when the pressure relief mechanism is activated, the discharge cannot diffuse laterally into the electrical cavity, but can only diffuse vertically into the collection cavity, thereby isolating the discharge from the busbar and improving the safety performance of the battery.

In a possible embodiment, the first sealing member is a frame-type structure having one through hole, the battery cells are installed in multiple locations, and the one through hole corresponds to the pressure relief mechanisms of the multiple battery cells.

By using a frame-type structure with one through hole as the sealing structure, processing is less difficult.

In a possible embodiment, the first sealing member is a lattice structure having a plurality of through holes, a plurality of battery cells are installed, and the plurality of through holes correspond one-to-one to the pressure relief mechanisms of the plurality of battery cells.

The sealing effect can be improved by using a lattice structure with multiple through holes as the sealing structure.

In a possible embodiment, the battery further includes a partition beam for dividing the electrical cavity into a plurality of storage cavities, and the sealing structure further includes a second sealing member disposed between a side wall of the storage cavity and a second wall of the battery cell, the second wall being disposed across the first wall.

By installing a second sealing member between the side wall of the storage cavity and the second wall of the battery cell, when the pressure relief mechanism is activated, the discharged material cannot diffuse vertically into the electrical cavity, but can only diffuse vertically into the collection cavity, thereby isolating the discharged material from the busbar and improving the safety performance of the battery.

In a possible embodiment, the first sealing member is a gasket or sealant and/or the second sealing member is a gasket or sealant.

This is easily achieved by using a regular sealant or gasket as the sealing structure.

In a possible embodiment, the sidewall of the cavity is provided with an adhesive injection hole for injecting the sealant.

Because the sealant has a certain fluidity when in use and gradually hardens after a certain time, it can be placed more easily by injecting it through the adhesive injection hole.

In a possible embodiment, the first seal member and the second seal member are integrally molded.

By using an integrally molded seal structure, it has a better sealing effect.

In a possible embodiment, the surface of the gasket is coated or spray painted with a material that has a melting point higher than the temperature of the effluent.

In a possible embodiment, the melting point of the seal structure is greater than the temperature of the effluent.

The heat resistance and stamping resistance requirements can be met by coating or spray painting the gasket surface with a material whose melting point is higher than the temperature of the effluent, or by using a seal structure whose melting point is higher than the temperature of the effluent.

In a second aspect, a power consumption device is provided, comprising a battery of the first aspect, the battery being adapted to provide electrical energy.

In a third aspect, a method for manufacturing a battery is provided, the method including the steps of: providing a battery cell in which a pressure relief mechanism is installed, the pressure relief mechanism being used to release the internal pressure by activating when the internal pressure or temperature of the battery cell reaches a threshold value; providing a bus bar for electrically connecting to the battery cell; providing an electrical cavity for accommodating the battery cell and the bus bar; providing a collection cavity for collecting emissions from the battery cell when the pressure relief mechanism is activated; and providing a seal structure installed in an airflow passage formed between the pressure relief mechanism and a wall of the electrical cavity for preventing the emissions from reaching the bus bar when the pressure relief mechanism is activated.

In a fourth aspect, a battery manufacturing apparatus is provided, the apparatus including a provision module for providing a battery cell in which a pressure relief mechanism is installed, the pressure relief mechanism being used to release the internal pressure by activating when the internal pressure or temperature of the battery cell reaches a threshold value, providing a bus bar for electrically connecting to the battery cell, providing an electrical cavity for accommodating the battery cell and the bus bar, providing a collection cavity for collecting emissions from the battery cell when the pressure relief mechanism is activated, and providing a seal structure installed in an airflow passage formed between the pressure relief mechanism and a wall of the electrical cavity for preventing the emissions from reaching the bus bar when the pressure relief mechanism is activated.

In order to more clearly explain the technical solutions of the embodiments of the present application, the following briefly introduces the drawings that need to be used in the embodiments of the present application, and it is obvious that the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on the drawings without requiring creative labor.

1 is a structural schematic diagram of a vehicle disclosed in an embodiment of the present application. FIG. 1 is a structural schematic diagram of a battery disclosed in one embodiment of the present application. FIG. 2 is a structural schematic diagram of a battery cell disclosed in one embodiment of the present application. FIG. 1 is a structural schematic diagram of a battery disclosed in one embodiment of the present application. FIG. 1 is a schematic plan view of a battery disclosed in one embodiment of the present application. FIG. 1 is a schematic cross-sectional view of a battery disclosed in one embodiment of the present application. FIG. 5C is an enlarged schematic view of a portion B in the battery of FIG . 5B disclosed in one embodiment of the present application. 2 is a structural schematic diagram of a first seal member disclosed in one embodiment of the present application. FIG. FIG. 4 is a structural schematic diagram of a first seal member disclosed in another embodiment of the present application. FIG. 6b is an exploded schematic view of a battery including the first sealing member of FIG. 6a provided in an embodiment of the present application. FIG. 6C is an exploded schematic view of a battery including the first sealing member of FIG. 6b provided in an embodiment of the present application. FIG. 2 is a schematic cross-sectional view of a battery disclosed in another embodiment of the present application. FIG. 7B is an enlarged schematic view of a portion C in the battery of FIG . 7A disclosed in one embodiment of the present application. FIG. 2 is a structural schematic diagram of a second seal member disclosed in an embodiment of the present application. FIG. 7C is an exploded schematic view of a battery including the second sealing member of FIG. 7C provided in an embodiment of the present application. FIG. 2 is a schematic cross-sectional view of a battery disclosed in yet another embodiment of the present application. FIG. 8b is an enlarged schematic view of a portion D in the battery of FIG . 8a disclosed in one embodiment of the present application. FIG. 8b is an enlarged schematic diagram of a portion E in the battery of FIG . 8a disclosed in one embodiment of the present application. FIG. 2 is a structural schematic diagram of a bottom completely covered type seal structure disclosed in an embodiment of the present application. FIG. 8C is an exploded schematic view of a battery including the sealing structure of FIG. 8D provided in an embodiment of the present application. FIG. 1 is a schematic block diagram of a method for manufacturing a battery according to an embodiment of the present application. FIG. 1 is a schematic block diagram of a battery manufacturing apparatus according to an embodiment of the present application.

In the drawings, the drawings are not drawn to actual scale.

In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described below with reference to the drawings of the embodiments of the present application, and it is obvious that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. Based on the embodiments of the present application, all other embodiments that a person skilled in the art can obtain without creative labor fall within the scope of protection of the present application.

Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art, and the terms used in this application are only for describing specific embodiments and are not intended to limit this application, and the terms "including" and "having" and any variations thereof in this application's specification, claims, and the brief description of the drawings are meant to cover non-exclusive inclusions. Terms such as "first" and "second" in this application's specification, claims, or drawings are intended to distinguish different objects and are not intended to describe a specific order or subordinate relationship.

All directions described in the following description are directions shown in the drawings and are not intended to limit the specific structure of the present application. In the description of the present application, it is necessary to further explain that unless clearly specified and limited, the terms "attach", "connect" and "connect" should have a broad meaning. For example, they may be fixedly connected, detachably connected, or integrally connected. They may be directly connected or indirectly connected via an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the present application based on the specific situation.

The description of an "embodiment" in this application means that a particular feature, structure, or characteristic described with reference to the embodiment may be included in at least one embodiment of this application. The appearance of the "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent embodiment or an alternative embodiment that is mutually exclusive with other embodiments. As can be understood explicitly and implicitly by one skilled in the art, the embodiment described in this application may be combined with other embodiments.

The term "and/or" in this application is merely a relational relationship describing related objects, and indicates the existence of a triple relationship. For example, A and/or B can indicate three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this application generally indicates that the related objects before and after it are in an "or" relationship.

As used herein, "multiple" refers to two or more (including two); similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple sheets" refers to two or more sheets (including two sheets).

In the present application, the battery cells may include lithium ion secondary batteries, lithium ion primary batteries, lithium sulfur batteries, sodium lithium ion batteries, sodium ion batteries, magnesium ion batteries, etc., and the embodiments of the present application are not limited thereto. The battery cells may be cylindrical, flat, rectangular, or other shapes, and the embodiments of the present application are not limited thereto. Depending on the packaging method, the battery cells are generally divided into three types: cylindrical battery cells, rectangular battery cells, and soft-pack battery cells, and the embodiments of the present application are not limited thereto.

The battery described in the embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery described in the present application may include a battery module or a battery pack. The battery generally includes a housing for packaging one or more battery cells. The housing can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

The battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode plate, a negative electrode plate, and a separator. The battery cell mainly operates by the movement of metal ions between the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive electrode collector and a positive electrode active material layer, and the positive electrode active material layer is applied to the surface of the positive electrode collector, and the current collector without the positive electrode active material layer protrudes from the current collector with the positive electrode active material layer applied, and the current collector without the positive electrode active material layer is a positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, lithium manganate, etc. The negative electrode plate includes a negative electrode collector and a negative electrode active material layer, and the negative electrode active material layer is applied to the surface of the negative electrode collector, and the current collector without the negative electrode active material layer protrudes from the current collector with the negative electrode active material layer applied, and the current collector without the negative electrode active material layer is a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that the positive electrode tabs do not melt even when a large current flows, the positive electrode tabs are multiple and stacked together, and the negative electrode tabs are multiple and stacked together. The material of the separator may be PP or PE, etc. In addition, the electrode assembly may have a wound structure or a stacked structure, and the embodiments of the present application are not limited thereto. The development of battery technology requires simultaneous consideration of various design factors, such as performance parameters such as energy density, cycle life, discharge capacity, and charge/discharge rate, and also requires consideration of battery safety.

For battery cells, the main safety hazard is from the charging and discharging process, and at the same time, the design of the appropriate environmental temperature is important. In order to effectively avoid unnecessary losses, there are generally at least three protection measures for battery cells. Specifically, the protection measures include at least a switching element, the selection of a suitable separator material, and a pressure relief mechanism. The switching element refers to an element that can stop the charging or discharging of the battery when the temperature or resistance inside the battery cell reaches a certain threshold. The separator is used to isolate the positive and negative plates, and when the temperature rises to a certain value, the micron-level (and even nano-level) micropores attached to it can be automatically dissolved, so that metal ions cannot pass through the separator and the internal reaction of the battery cell is terminated.

The pressure relief mechanism refers to an element or member that is activated when the internal pressure or temperature of the battery cell reaches a certain threshold to release the internal pressure or temperature. The threshold design varies according to different design needs. The threshold may be determined by one or more of the materials of the positive plate, the negative plate, the electrolyte, and the separator of the battery cell. The pressure relief mechanism may take the form of, for example, an explosion-proof valve, an air valve, a relief valve, or a safety valve, and may specifically take the form of a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature of the battery cell reaches a certain threshold, the pressure relief mechanism is activated or a weak structure provided in the pressure relief mechanism is destroyed, thereby forming an opening or passage for releasing the internal pressure or temperature.

As used herein, "operation" refers to the pressure relief mechanism operating or being activated to a predetermined state, thereby releasing the internal pressure and temperature of the battery cell. The operation of the pressure relief mechanism may include, but is not limited to, at least a portion of the pressure relief mechanism breaking, crushing, tearing, opening, etc. When the pressure relief mechanism operates, the high temperature and high pressure material inside the battery cell is discharged as a discharge from the operating portion. In this manner, the battery cell can be released under a condition where the pressure or temperature is controllable, thereby avoiding a potentially more serious accident.

The discharged materials from the battery cells described in this application include, but are not limited to, electrolyte, dissolved or split positive and negative plates, separator fragments, high-temperature and high-pressure gases produced in the reaction, flames, etc.

The pressure relief mechanism of a battery cell has an important impact on the safety of the battery. For example, when a phenomenon such as a short circuit or overcharging occurs, thermal runaway may occur inside the battery cell, causing a sudden rise in pressure or temperature. In this case, the pressure relief mechanism can be activated to release the internal pressure and temperature to the outside, thereby preventing the battery cell from exploding or catching fire.

In the conventional pressure relief mechanism design, the main focus is to release the high pressure and heat inside the battery cell, i.e., to discharge the discharged material to the outside of the battery cell. However, in order to ensure the output voltage or current of the battery, multiple battery cells are often required, and the multiple battery cells are electrically connected through bus bars. The discharged material from inside the battery cell may cause a short circuit phenomenon of other battery cells, for example, when the discharged metal chips electrically connect two bus bars, it may cause a short circuit of the battery, thus creating a safety hazard. Moreover, the high temperature and high pressure discharged material is discharged toward the direction where the pressure relief mechanism of the battery cell is installed, more specifically, along the direction toward the area where the pressure relief mechanism is operating, and the force and destructive power of the discharged material may be strong, and may even be enough to break one or more structures in that direction, resulting in further safety issues.

In view of this, the embodiment of the present application provides a technical solution, which uses an isolating member to separate the electrical cavity that accommodates the battery cells from the collection cavity that collects the exhaust. When the pressure relief mechanism is activated, the exhaust from the battery cells enters the collection cavity, but does not enter the electrical cavity, or enters the electrical cavity in a small amount, thereby preventing short circuits caused by insulation protection problems in the electrical cavity, and thus improving the safety of the battery. At the same time, the exhaust generated after the battery cells go out of control is discharged into the collection cavity, and then discharged outside the battery through the pressure relief area, thereby extending the exhaust discharge path, which can effectively reduce the temperature of the exhaust and reduce the impact of the exhaust on the external environment of the battery, thereby further improving the safety of the battery.

Here, the so-called "isolation" refers to separation, and does not necessarily mean sealing. Usually, the isolation member is used to separate the electrical cavity from the collection cavity, and also to contain a fluid to perform temperature control for the battery cells, i.e., the isolation member may be called a thermal management member. The fluid contained in the thermal management member may be a liquid or a gas, and temperature control refers to heating or cooling the battery cells. When cooling or lowering the temperature of the battery cells, the thermal management member is used to contain a cooling fluid to lower the temperature of the battery cells, and in this case, the thermal management member may be called a cooling member, a cooling system, a cooling plate, etc., and the fluid contained therein may be called a cooling medium or a cooling fluid, or more specifically, a coolant or a cooling gas. The thermal management member may also be used to heat the battery cells, and the embodiments of the present application are not limited thereto. Alternatively, the fluid may be circulated, thereby achieving a better temperature control effect. Alternatively, the fluid may be water, a mixture of water and ethylene glycol, or air, etc.

The electrical cavity described herein can be used to house multiple battery cells and bus bars. The electrical cavity can be sealed or unsealed. The electrical cavity provides mounting space for the battery cells and bus bars. In some embodiments, the electrical cavity can further include a structure for securing the battery cells. The shape of the electrical cavity can be determined by the number and shape of the battery cells and bus bars to be housed. In some embodiments, the electrical cavity can be rectangular and have six walls. Because the battery cells within the electrical cavity form a high voltage output through electrical connections, the electrical cavity can be referred to as a "high voltage cavity."

The busbars described herein are used to realize electrical connections between multiple battery cells, such as parallel connections, series connections, or series-parallel connections. The busbars can realize electrical connections between the battery cells by connecting the electrode terminals of the battery cells. In some embodiments, the busbars may be fixed to the electrode terminals of the battery cells by welding. Corresponding to the "high voltage cavity", the electrical connection formed by the busbars may be referred to as a "high voltage connection".

The collection cavity described herein is used to collect the effluent and may be sealed or unsealed. In some embodiments, the collection cavity may contain air or other gas. Optionally, the collection cavity may contain a liquid, such as a cooling medium, or a member for containing the liquid, thereby further reducing the temperature of the effluent that enters the collection cavity. Optionally, the gas or liquid in the collection cavity is circulating. There is no electrical connection in the collection cavity that is connected to a voltage output, and the collection cavity may be referred to as a "low pressure cavity" in correspondence with the "high pressure cavity."

By separating the electrical cavity and the collecting cavity with an isolating member, the discharged matter from the battery cell can be directed into the collecting cavity when the pressure relief mechanism is activated. However, in actual applications, a small amount of discharged matter may still enter the electrical cavity, causing problems with the insulation protection in the electrical cavity and resulting in a short circuit, thereby compromising the safety performance of the battery.

In view of this, the embodiment of the present application is based on the above embodiment, and further adds a sealing structure, which is installed in the airflow passage formed between the pressure relief mechanism and the wall of the electrical cavity, and is used to prevent the exhaust of the battery cell from reaching the busbar when the pressure relief mechanism is activated, in other words, to further separate the exhaust from the high-voltage connection, reduce the risk of insulation protection trouble, reduce the possibility of high-voltage ignition, and improve the safety of the battery. It also prevents the concentration of high-temperature particulate matter in high-risk areas, and reduces the possibility of trouble modes caused by local abnormal temperature rise.

All of the technical solutions described in the embodiments of the present application can be applied to various devices that use batteries, such as mobile phones, portable devices, laptops, electric cars, electric toys, electric tools, electric vehicles, ships, and spacecraft, including, for example, airplanes, rockets, space shuttles, and spaceships.

As will be understood, the technical solutions described in the embodiments of the present application are not only applicable to the devices described above, but also to all devices that use batteries, but for the sake of simplicity, all of the following embodiments will be described using an electric vehicle as an example.

For example, as shown in FIG. 1, a structural schematic diagram of a vehicle 1 according to an embodiment of the present application, the vehicle 1 may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended range electric vehicle, etc. A motor 80, a controller 60, and a battery 100 may be installed inside the vehicle 1, and the controller 60 is used to control the battery 100 to supply power to the motor 80. For example, the battery 100 may be installed at the bottom of the vehicle 1 or at the front or rear of the vehicle. The battery 100 may be used to power the vehicle 1, for example, the battery 100 may function as an operating power source for the vehicle 1, and may be used for the circuit system of the vehicle 1, for example, for the operating electrical needs during booting, navigation, and driving of the vehicle 1. In another embodiment of the present application, the battery 100 may function not only as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, and may provide driving power to the vehicle 1 by replacing or partially replacing fuel or natural gas.

To meet different electrical usage needs, a battery may include multiple battery cells, and the multiple battery cells may be connected in series, parallel, or series-parallel, where series-parallel connection refers to a mixture of series and parallel connections. The battery may be called a battery pack. Alternatively, multiple battery cells may first be connected in series, parallel, or series-parallel to form a battery module, and then multiple battery modules may be connected in series, parallel, or series-parallel to form a battery. That is, multiple battery cells may directly form a battery, or may first form a battery module, and then the battery module may form a battery.

For example, as shown in FIG. 2, which is a structural schematic diagram of a battery 100 according to an embodiment of the present application, the battery 100 may include a plurality of battery cells 20. The battery 100 may further include a housing (or called a cap), the inside of which is a hollow structure, and the plurality of battery cells 20 are accommodated in the housing. As shown in FIG. 2, the housing may include two parts, which are called a first part 111 and a second part 112, respectively, and the first part 111 and the second part 112 are engaged together. The shapes of the first part 111 and the second part 112 can be determined by the shape of the combination of the plurality of battery cells 20, and the first part 111 and the second part 112 may each have one opening. For example, the first part 111 and the second part 112 may each be a hollow rectangular parallelepiped, and each has only one surface that is an opening surface, the opening of the first part 111 and the opening of the second part 112 are installed opposite to each other, and the first part 111 and the second part 112 are engaged with each other to form a housing having a sealed chamber. The multiple battery cells 20 are combined in parallel, series, or series-parallel connections and then placed in a housing formed by engaging the first part 111 and the second part 112.

Optionally, the battery 100 may further include other structures, which will not be described again here. For example, the battery 100 may further include a bus bar, which is used to realize an electrical connection between the multiple battery cells 20, for example, a parallel connection, a series connection, or a series-parallel connection. Specifically, the bus bar can realize an electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20. Furthermore, the bus bar may be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the multiple battery cells 20 can further be extracted through the housing via a conductive mechanism. Optionally, the conductive mechanism may belong to the bus bar.

According to different power needs, the number of battery cells 20 may be set to any value. Multiple battery cells 20 can be connected in series, parallel, or series-parallel to achieve large capacity or power. Since each battery 100 may contain a large number of battery cells 20, the battery cells 20 may be installed in groups for ease of installation, and each group of battery cells 20 constitutes a battery module. The number of battery cells 20 included in a battery module is not limited and may be set according to needs.

3 is a structural schematic diagram of a battery cell 20 according to an embodiment of the present application, in which the battery cell 20 includes one or more electrode assemblies 22, a case 211, and a cover plate 212. The wall of the case 211 and the cover plate 212 are both referred to as the wall of the battery cell 20. The shape of the case 211 is determined by the shape after assembling one or more electrode assemblies 22, for example, the case 211 may be a hollow rectangular parallelepiped, cube, or cylinder, and one surface of the case 211 has an opening, so that one or more electrode assemblies 22 can be placed in the case 211. For example, when the case 211 is a hollow rectangular parallelepiped or cube, one plane of the case 211 is an open surface, i.e., the plane does not have a wall and communicates with the inside and outside of the case 211. When the case 211 is a hollow cylinder, the end surface of the case 211 is an open surface, i.e., the end surface does not have a wall and communicates with the inside and outside of the case 211. The cover plate 212 covers the opening and connects to the case 211 to form a sealed cavity in which the electrode assembly 22 is placed. The case 211 is filled with an electrolyte, e.g., an electrolyte solution.

The battery cell 20 may further include two electrode terminals 214, which may be installed on the cover plate 212. The cover plate 212 is generally flat, and the two electrode terminals 214 are fixed to the flat surface of the cover plate 212, and the two electrode terminals 214 are respectively a positive electrode terminal 214a and a negative electrode terminal 214b. A connecting member 23, which may be called a current collecting member 23, is installed correspondingly to each electrode terminal 214, and is located between the cover plate 212 and the electrode assembly 22, and is used to realize the electrical connection between the electrode assembly 22 and the electrode terminal 214.

As shown in FIG. 3, each electrode assembly 22 has a first tab 221a and a second tab 222a. The polarities of the first tab 221a and the second tab 222a are opposite. For example, when the first tab 221a is a positive electrode tab, the second tab 222a is a negative electrode tab. The first tab 221a of one or more electrode assemblies 22 is connected to one electrode terminal via one connection member 23, and the second tab 22a of one or more electrode assemblies 22 is connected to the other electrode terminal via the other connection member 23. For example, the positive electrode terminal 214a is connected to the positive electrode tab via one connection member 23, and the negative electrode terminal 214b is connected to the negative electrode tab via the other connection member 23.

In the battery cell 20, one or more electrode assemblies 22 may be installed according to actual usage needs, and as shown in FIG. 3, four independent electrode assemblies 22 are installed in the battery cell 20.

For example, a pressure relief mechanism 213 may be further installed on one wall of the battery cell 20, for example, the first wall 21a shown in FIG. 3. For ease of illustration, the first wall 21a and the case 211 are separated in FIG. 3, but the case 211 is not limited to having an opening on the bottom side. The pressure relief mechanism 213 is used to release the internal pressure or temperature by operating when the internal pressure or temperature of the battery cell 20 reaches a threshold value.

The pressure relief mechanism 213 may be a part of the first wall 21a, and may have a split structure with the first wall 21a, for example, fixed to the first wall 21a by welding. When the pressure relief mechanism 213 is a part of the first wall 21a, for example, the pressure relief mechanism 213 may be formed by installing a score on the first wall 21a, and the thickness of the first wall 21a corresponding to the score is smaller than the thickness of other areas of the pressure relief mechanism 213 except the score. The score is the weakest point of the pressure relief mechanism 213. When too much gas is generated in the battery cell 20, the internal pressure of the case 211 increases and reaches a threshold value, or when the internal reaction of the battery cell 20 generates heat and the internal temperature of the battery cell 20 increases and reaches a threshold value, the pressure relief mechanism 213 can burst at the score, connecting the inside and outside of the case 211, and the gas pressure and temperature are released to the outside by the bursting of the pressure relief mechanism 213, and the explosion of the battery cell 20 is further avoided.

Optionally, in one embodiment of the present application, as shown in FIG. 3, when the pressure relief mechanism 213 is installed on the first wall 21a of the battery cell 20, the electrode terminal 214 is installed on another wall of the battery cell 20, the other wall being different from the first wall 21a.

Optionally, the wall of the electrode terminal 214 and the first wall 21a are disposed opposite each other. For example, the first wall 21a may be the bottom wall of the battery cell 20, and the wall of the electrode terminal 214 may be the top wall of the battery cell 20, i.e., the cover plate 212.

Optionally, as shown in FIG. 3, the battery cell 20 may further include a spacer 24, which is located between the electrode assembly 22 and the bottom wall of the case 211 and can play a supporting role for the electrode assembly 22, and can effectively prevent interference between the electrode assembly 22 and the fillets around the bottom wall of the case 211. The spacer 24 may also have one or more through holes, for example, a uniformly arranged plurality of through holes, or when the pressure relief mechanism 213 is installed on the bottom wall of the case 211, a through hole may be installed at a position corresponding to the pressure relief mechanism 213, thereby facilitating the passage of liquid and air. Specifically, the spaces on the upper and lower surfaces of the spacer 24 can be connected in this way, and the gas and electrolyte generated inside the battery cell 20 can freely pass through the spacer 24.

By locating the pressure relief mechanism 213 and the electrode terminal 214 on different walls of the battery cell 20, when the pressure relief mechanism 213 is activated, the discharged matter of the battery cell 20 is further away from the electrode terminal 214, thereby reducing the impact of the discharged matter on the electrode terminal 214 and the busbar, and therefore improving the safety of the battery.

Furthermore, by installing the pressure relief mechanism 213 on the bottom wall of the battery cell 20 when the electrode terminal 214 is installed on the cover plate 212 of the battery cell 20, when the pressure relief mechanism 213 is activated, the discharged material of the battery cell 20 is discharged to the bottom of the battery 100. In this way, on the one hand, the risk of discharged material can be reduced by utilizing a thermal management member or the like on the bottom of the battery 100, and on the other hand, the bottom of the battery 100 is usually away from the user, thereby reducing damage to the user.

The pressure relief mechanism 213 may have various possible pressure relief structures, and the embodiments of the present application are not limited thereto. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism configured to melt when the internal temperature of the battery cell 20 to which the pressure relief mechanism 213 is provided reaches a threshold value, and/or the pressure relief mechanism 213 may be a pressure-sensitive pressure relief mechanism configured to burst when the internal air pressure of the battery cell 20 to which the pressure relief mechanism 213 is provided reaches a threshold value.

Figure 4 shows a schematic diagram of one battery 100 according to an embodiment of the present application. As shown in Figure 4, the battery 100 includes a plurality of battery cells 20, and at least one of the plurality of battery cells 20 is provided with a pressure relief mechanism 213, which is used to release the internal pressure by activating when the internal pressure or temperature of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value. In one embodiment, each of the plurality of battery cells 20 is provided with a pressure relief mechanism 213. In another embodiment, each of some of the plurality of battery cells 20 is provided with a pressure relief mechanism 213, and none of the other battery cells 20 of the plurality of battery cells 20 is provided with a pressure relief mechanism 213.

The battery 100 further includes a bus bar 12 for electrically connecting to the battery cells 20; in other words, the bus bar 12 is used to realize an electrical connection between the multiple battery cells 20. Optionally, the bus bar 12 can realize an electrical connection between the battery cells 20 by connecting the electrode terminals 214 of the battery cells 20.

The battery 100 further includes an electrical cavity 11a and a collection cavity 11b, where the electrical cavity 11a is used to accommodate the plurality of battery cells 20 and the busbar 12, the electrical cavity 11a provides an accommodation space for the battery cells 20 and the busbar 12, and the shape of the electrical cavity 11a can be determined by the plurality of battery cells 20 and the busbar 12. The collection cavity 11b is used to collect the discharge from the battery cells 20 when the pressure relief mechanism 213 is activated.

In one embodiment of the present application, the electrical cavity 11a is a sealed cavity, while the collection cavity 11b is a semi-sealed cavity, with an opening communicating with the outside, and the wall of the electrical cavity 11a covers the opening to form a cavity, i.e., the collection cavity 11b. In other words, the wall for covering the opening of the collection cavity 11b of the electrical cavity 11a is a wall shared by the electrical cavity 11a and the collection cavity 11b, and the electrical cavity 11a and the collection cavity 11b are installed separately by the shared wall. In another embodiment of the present application, the collection cavity 11b is a sealed cavity, while the electrical cavity 11a is a semi-sealed cavity, with an opening communicating with the outside, and the wall of the collection cavity 11b covers the opening to form a cavity, i.e., the electrical cavity 11a. That is, the wall for covering the opening of the electrical cavity 11a of the collecting cavity 11b is a wall shared by the electrical cavity 11a and the collecting cavity 11b, and the electrical cavity 11a and the collecting cavity 11b are separated by the shared wall. In another embodiment of the present application, the electrical cavity 11a is a sealed cavity, and the collecting cavity 11b is also a sealed cavity, and one wall of the electrical cavity 11a and one wall of the collecting cavity 11b can be attached together, thereby forming two adjacent independent cavities, and the two walls attached together can be a wall shared by the electrical cavity 11a and the collecting cavity 11b, and the electrical cavity 11a and the collecting cavity 11b are separated by the shared wall.

Optionally, in the embodiment of the present application, the battery 100 may further include an isolation member 13, which has a wall shared by the electrical cavity 11a and the collection cavity 11b. The isolation member 13 may be one wall of the electrical cavity 11a and one wall of the collection cavity 11b at the same time. That is, the isolation member 13 (or a part thereof) may be directly a wall shared by the electrical cavity 11a and the collection cavity 11b, and thus the discharge of the battery cell 20 may pass through the isolation member 13 and enter the collection cavity 11b.

In each of the above embodiments, the presence of a wall shared by the electrical cavity 11a and the collection cavity 11b allows for maximum isolation of the emissions, thereby reducing the risk of emissions and increasing the safety of the battery.

Furthermore, the battery 100 further includes a sealing structure 215, which is installed in the airflow passage formed between the pressure relief mechanism 213 and the wall of the electrical cavity 11a, and is used to prevent emissions from reaching the busbar 12 when the pressure relief mechanism 213 is activated.

Although there is a shared wall between the electrical cavity 11a and the collection cavity 11b to isolate them, in practical applications, a small amount of emissions still enters the electrical cavity 11a. In the embodiment of the present application, by providing a seal structure 215 in the airflow passage formed between the pressure relief mechanism 213 and the wall of the electrical cavity 11a, when the pressure relief mechanism 213 is activated, the emissions of the battery cells 20 can be stopped from entering the electrical cavity 11a, reducing the risk of insulation protection trouble and reducing the possibility of high voltage ignition, thereby improving the safety of the battery. In addition, the presence of the seal structure 215 can prevent the concentration of high-temperature particulate matter in high-risk areas and reduce the possibility of trouble modes caused by localized temperature rise.

It is important to note that the airflow passage formed between the pressure relief mechanism 213 and the wall of the electrical cavity 11a not only includes an airflow passage parallel to the plane in which the pressure relief mechanism 213 in the electrical cavity 11a is located, but also includes an airflow passage perpendicular to the plane in which the pressure relief mechanism 213 in the electrical cavity 11a is located.

As can be understood, FIG. 4 is merely an example, showing a schematic cross-sectional view of one embodiment of the seal structure 215, and is not intended to limit the scope of protection of the present application. The seal structure 215 provided in the examples of the present application may have other forms in addition to the example shown in FIG. 4, and/or the installation position of the seal structure 215 is intended to be used to prevent emissions from reaching the bus bar 12 when the pressure relief mechanism 213 is activated, and the examples of the present application do not specifically limit the form and position of the seal structure 215.

Optionally, as shown in FIG. 4, the sealing structure 215 is installed around at least the outer periphery of the pressure relief mechanism 213 to prevent the exhaust from reaching the busbar 12 when the pressure relief mechanism 213 is activated.

Below, a specific embodiment in which the sealing structure 215 is installed surrounding the outer periphery of the pressure relief mechanism 213 will be described in detail. For convenience of explanation, the battery cell 20 in this embodiment refers to the battery cell 20 provided with the pressure relief mechanism 213, and for example, the battery cell 20 may be the battery cell 20 in FIG. 3.

Figure 5a is a schematic plan view of one battery 100 according to an embodiment of the present application. Figure 5b is a cross-sectional view of the battery 100 according to an embodiment of the present application along the A-A' direction, and Figure 5c is a localized detailed view corresponding to the portion B in Figure 5b.

As shown in Figures 5a to 5c, the sealing structure 215 of the embodiment of the present application includes a first sealing member 215a that is installed around the outer periphery of the pressure relief mechanism 213. Specifically, the pressure relief mechanism 213 is installed on the first wall 21 of the battery cell 20, and the first sealing member 215a is installed between the first wall 21 and the isolating member 13. That is, the first sealing member 215a is installed between the wall on which the pressure relief structure 213 of the battery cell 20 is provided and the isolating member 13. The first sealing member 215a has a through hole at a position corresponding to the pressure relief mechanism 213, and when the pressure relief mechanism 213 is operated, the discharged matter passes through the through hole, passes through the isolating member 13, and enters the collecting cavity 11b.

A first sealing member 215a is installed on the outer periphery of the pressure relief mechanism 213, and the first sealing member 215a has a through hole at a position corresponding to the pressure relief mechanism 213, so that when the pressure relief mechanism 213 is activated, the discharge cannot diffuse laterally into the electrical cavity 11a, but can only diffuse vertically into the collection cavity 11b, thereby isolating the discharge from the busbar 12 and improving the safety performance of the battery.

Figure 6a shows a structural schematic diagram of one first sealing member 215a. Figure 6b shows a structural schematic diagram of another first sealing member 215a. Figure 6c is an exploded view of a battery 100 including the first sealing member 215a of Figure 6a. Figure 6d is an exploded view of a battery 100 including the first sealing member 215a of Figure 6b.

As shown in FIG. 6a, the first sealing member 215a may be a frame-type structure having one through-hole, that is, one through-hole corresponds to the pressure relief mechanism 213 of the multiple battery cells 20.

As shown in FIG. 6b, the first sealing member 215a may have a lattice structure having a plurality of through holes, which correspond one-to-one to the pressure relief mechanisms 213 of the plurality of battery cells 20, i.e., each of the plurality of through holes corresponds to the pressure relief mechanism 213 of one battery cell 20.

Specifically, as shown in Figs. 6c and 6d, the battery 100 includes a plurality of battery cells 20, which may be divided into at least one battery module 30, or may be called a battery module or battery pack. The battery 100 further includes a bus bar 12, which is used to realize electrical connections between the plurality of battery cells 20, such as parallel connection, series connection, or series-parallel connection. The bus bar 12 can realize electrical connections between the battery cells 20 by connecting the electrode terminals 214 of the battery cells 20. The battery 100 generally further includes a housing for packaging the plurality of battery cells 20, which may include an enclosure 41 surrounded by two end plates and two side plates, an upper cover 42 of the housing, and a lower cover 43 of the housing, and the upper cover 42 of the housing and the lower cover 43 of the housing respectively cover both side openings of the enclosure 41 to form a chamber. The battery 100 further includes an isolation member 13, which can divide the chamber formed in the housing 40 into an electrical cavity 11a and a collection cavity 11b, where the electrical cavity 11a is used to accommodate the plurality of battery cells 20 and the busbar 12, and the collection cavity 11b is used to collect the discharge from the battery cells 20 when the pressure relief mechanism 213 is activated.

As shown in FIG. 6c, the battery cells 20 are stacked. The first sealing member 215a is a frame-type structure including one through-hole, which corresponds to the pressure relief mechanism 213 of the battery cells 20 stacked in the same direction. That is, the pressure relief mechanism of the battery cells 20 stacked in the same direction can be an integral structure, and the first sealing member 215a is installed around the periphery of the integral structure. Optionally, one through-hole of the first sealing member 215a may also correspond to the pressure relief mechanism 213 of one battery cell array stacked in two directions, that is, the pressure relief mechanism 213 of the one battery cell array can be an integral structure, and the first sealing member 215a is installed around the periphery of the integral structure.

It is important to note that in the integrated structure surrounded by the first sealing member 215a in FIG. 6c, the pressure relief mechanism 213 may be installed in some of the battery cells 20, while the pressure relief mechanism may not be installed in other parts of the battery cells 20.

By using a frame-type structure with one through hole as the sealing structure, processing is less difficult.

As shown in FIG. 6d, the battery cells 20 are stacked. The first sealing member 215a has a lattice structure including a plurality of through holes, and the through holes may correspond one-to-one to the pressure relief mechanisms 213 of the battery cells 20 stacked in the same direction. That is, the first sealing member 215a is installed to surround the outer periphery of the pressure relief mechanism 213 of each battery cell 20 among the battery cells 20 stacked in the same direction. Optionally, the plurality of through holes of the first sealing member 215a may also correspond one-to-one to the pressure relief mechanism 213 of one battery cell array stacked in two directions, that is, the first sealing member 215a is installed to surround the outer periphery of the pressure relief mechanism 213 of each battery cell 20 among the battery cells 20 stacked in the same direction.

The sealing effect can be improved by using a lattice structure with multiple through holes as the sealing structure.

Optionally, in the embodiment of the present application, a pressure relief mechanism 213 is provided in some of the battery cells 20 of the battery 100, but a pressure relief mechanism 213 is not provided in some of the other battery cells 20, so that a first sealing member 215a can be installed on the outer periphery of each pressure relief mechanism 213; that is, the first sealing member 215a has a mouth-shaped structure with one through hole, and the one through hole corresponds to one pressure relief mechanism 213, which not only improves the sealing effect but also reduces the difficulty of processing.

Optionally, in the embodiment of the present application, the battery 100 may include at least two of the first sealing member 215a with the frame structure, the first sealing member 215a with the lattice structure, and the first sealing member 215a with the mouth-shaped structure.

Figure 7a is another cross-sectional view along the A-A' direction of the battery 100 shown in Figure 5a, and Figure 7b is a localized detailed view corresponding to point C in Figure 7a.

As shown in Figures 7a and 7b, the battery 100 further includes a partition beam 44, which is used to divide the electrical cavity 11a into a plurality of receiving cavities 11c, and the sealing structure 215 includes a second sealing member 215b installed between the side wall of the receiving cavity 11c and the second wall of the battery cell 20, which is installed crossing the first wall of the above embodiment. The battery cell 20 is the battery cell 20 located at the outermost periphery in the receiving cavity 11c. The battery cell 20 may or may not be installed with a pressure relief mechanism 213.

Optionally, in the embodiment of the present application, the second sealing member 215b may cover the entire second wall of the battery cell 20 as shown in Figures 7a and 7b, or may cover a portion of the second wall of the battery cell 20, and the embodiment of the present application does not limit the height of the second sealing member 215b.

By installing the second seal member 215b between the side wall of the storage cavity 11c and the second wall of the battery cell 20, when the pressure release mechanism 213 is activated, the discharged material cannot diffuse vertically into the electrical cavity 11a, but can only diffuse vertically into the collection cavity 11b, thereby isolating the discharged material from the busbar 12 and improving the safety performance of the battery.

Figure 7c shows a schematic structural diagram of the second sealing member 215b provided in the embodiment of the present application. Figure 7d shows an exploded view of the battery 100 including the second sealing member 215b. As shown in Figures 7c and 7d, the second sealing member 215b is a frame-type structure that is installed around the second wall of the battery cell 20 located at the outermost periphery in the receiving cavity 11c and is used to seal the gap between the second wall of the outermost battery cell 20 and the side wall of the receiving cavity 11c, thereby preventing the exhaust from reaching the bus bar 12 when the pressure relief mechanism 213 in the receiving cavity 11c is activated.

Optionally, in the embodiment of the present application, the battery 100 may include a first sealing member 215a and a second sealing member 215b, that is, the first sealing member 215a can be installed between the first wall of the battery cell 20 provided with the pressure relief mechanism 213 and the isolating member 13, and the first sealing member 215a has a through hole at a position corresponding to the pressure relief mechanism 213, and when the pressure relief mechanism 213 is operated, the discharged material passes through the through hole and passes through the isolating member 12 and enters the collecting cavity 11b. In addition, the second sealing member 215b can be installed between the side wall of the receiving cavity 11c and the second wall of the battery cell 20 located at the outermost periphery of the receiving cavity 11c, and is used to seal the gap between the side wall of the receiving cavity 11c and the second wall of the outermost battery cell 20, thereby preventing the discharged material from reaching the bus bar 12 when the pressure relief mechanism 213 inside the receiving cavity 11c is operated. The first wall and the second wall of the battery cell 20 are installed crosswise.

By installing the first sealing member 215a and the second sealing member 215b, the airflow passage formed between the pressure relief mechanism 213 and the busbar 12 can be sealed in all directions, thereby better preventing emissions from reaching the busbar 12 when the pressure relief mechanism 213 is operating.

Optionally, in this embodiment, the first sealing member 215a may be a gasket or sealant. The second sealing member 215b may also be a gasket or sealant.

Optionally, in the present embodiment, the first seal member 215a may be a compressible seal material, typically silicone rubber or aerogel felt. The second seal member 215b may also be a compressible seal material, typically silicone rubber or aerogel felt.

In a possible embodiment, if the first sealing member 215a or the second sealing member 215b is a gasket, its surface may be coated or spray-painted with a material whose melting point is higher than the temperature of the discharged material, thereby meeting the requirements of heat resistance and stamping resistance.

In another possible embodiment, the melting point of the first seal member 215a and/or the second seal member 215b is higher than the temperature of the discharge, which can also meet the heat resistance and stamping resistance requirements.

Optionally, in the embodiment of the present application, if the second sealing member 215b uses a sealant, an adhesive injection hole for injecting the sealant may be provided on the side wall of the receiving cavity 11c. Since the sealant has a certain fluidity during use and gradually hardens after a certain time, the sealant can be more easily positioned by injecting the sealant through the adhesive injection hole, thereby forming the second sealing member 215b after hardening.

Optionally, in the embodiment of the present application, the battery 100 simultaneously includes a first sealing member 215a and a second sealing member 215b, the first sealing member 215a may be a gasket, and the second sealing member 215b may be a sealant, and the simultaneous use of the sealant and the gasket ensures that the battery 100 has a better sealing effect.

Optionally, in the embodiment of the present application, the battery 100 includes a first sealing member 215a and a second sealing member 215b, and the first sealing member 215a and the second sealing member 215b may be an integrally molded sealing structure 215. Specifically, the sealing structure 215 uses a bottom full-coverage type gasket.

Below, we will introduce in detail a specific example in which the sealing structure 215 is a bottom-fully covering gasket.

Figure 8a is another cross-sectional view of the battery 100 shown in Figure 5a along the A-A' direction, and Figure 8b is a local detail view corresponding to point D in Figure 8a. Figure 8c is a local detail view corresponding to point E in Figure 8a. Figure 8d is a structural diagram of a bottom fully covered seal structure 215. Figure 8e is an exploded view of the battery 100 including the bottom fully covered seal structure 215 shown in Figure 8d.

8a to 8e, the sealing structure 215 is a bottom full-covering type structure. As shown in FIG. 8a to 8e, the sealing structure 215 includes a first sealing member 215a installed between the first wall of the battery cell 20 and the isolating member 13, and a second sealing member 215b located between the second wall of the outermost battery cell 20 in the receiving cavity 11c and the side wall of the receiving cavity 11c. The first sealing member 215 covers all positions of the first wall of the battery cell 20 except the pressure relief mechanism 213, that is, the first sealing member 215 has a through hole at a position corresponding to the pressure relief mechanism 213 of the battery cell 20, that is, the first sealing member 215 is installed surrounding the outer periphery of the pressure relief mechanism 213 of the battery cell 20. The first sealing member 215a and the second sealing member 215b are connected at the position where the first wall and the second wall of the battery cell 20 intersect.

The sealing effect can be improved by using a bottom-fully covered seal structure 215.

As can be understood, the above are merely exemplary examples of the installation positions, shapes, and materials used for some sealing structures 215. In actual applications, appropriate installation positions, shapes, and materials can be selected based on actual conditions, and the present application is not limited thereto.

An embodiment of the present application further provides a power consumption device, which may include the battery 100 of any of the above embodiments, and the battery 100 is used to provide electrical energy.

Optionally, the power consumer device may be a vehicle 1, a watercraft or a spacecraft.

The above describes the battery and power consumption device according to the embodiments of the present application. Below, the battery manufacturing method and device according to the embodiments of the present application will be described. For parts that are not described in detail, please refer to the above embodiments.

Figure 9 shows a schematic flow chart of a method 300 for manufacturing a battery according to one embodiment of the present application. The battery may be the battery 100 provided in each of the above embodiments, and as shown in Figure 9, the method 300 may include the following steps S310 to S350.

S310 provides battery cell 20.

In one embodiment, the number of the battery cells 20 may be multiple, and at least one of the multiple battery cells 20 is provided with a pressure relief mechanism 213, which is used to release the internal pressure by activating when the internal pressure or temperature of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value.

Provide S320, busbar 12.

In one embodiment, the busbar 12 is used to realize an electrical connection of a plurality of battery cells 20, for example, a parallel connection, a series connection, or a series-parallel connection. The busbar can realize an electrical connection between the battery cells by connecting the electrode terminals of the battery cells. In some embodiments, the busbar may be fixed to the electrode terminals of the battery cells by welding.

S330, providing electrical cavity 11a.

In one embodiment, the electrical cavity 11a is used to accommodate a plurality of battery cells 20 and bus bars 12. That is, the electrical cavity 11a provides mounting space for the battery cells 20 and bus bars 12.

S340, providing collection cavity 11b.

In one embodiment, the collection cavity 11b is used to collect discharge from the battery cell 20 when the pressure relief mechanism 213 is activated.

S350, providing a sealing structure 215.

In one embodiment, the sealing structure 215 is installed in the air flow passage formed between the pressure relief mechanism 213 and the wall of the electrical cavity 11a, and is used to prevent emissions from reaching the busbar 12 when the pressure relief mechanism 213 is activated.

Optionally, in the embodiment of the present application, an isolation member 13 may be further provided to isolate the electrical cavity 11a and the collection cavity 11b, the electrical cavity 11a and the collection cavity 11b being disposed on both sides of the isolation member 13, and the isolation member 13 being configured as a wall shared by the electrical cavity 11a and the collection cavity 11b.

Optionally, in the embodiment of the present application, the sealing structure 215 includes a first sealing member 215a installed between the first wall of the battery cell 20 and the isolating member 13, and the first sealing member 215a has a through hole at a position corresponding to the pressure relief mechanism 213, and when the pressure relief mechanism 213 is activated, the discharged matter passes through the through hole, passes through the isolating member 13, and enters the collection cavity 11b.

Optionally, in the embodiment of the present application, the battery 100 further includes a partition beam 44 for dividing the electrical cavity 11a into a plurality of receiving cavities 11c, and the sealing structure 215 includes a second sealing member 215b installed between the side wall of the receiving cavity 11c and the second wall of the battery cell 20, and the first wall and the second wall of the battery cell 20 are installed crosswise.

Optionally, in an embodiment of the present application, the second sealing member 215b is a sealant, and the step of providing the sealing structure 215 specifically includes the step of forming the second sealing member 215b after the sealant has hardened by injecting the sealant into an adhesive injection hole in the side wall of the receiving cavity 11c.

Figure 10 shows a schematic block diagram of a battery manufacturing apparatus 400 according to one embodiment of the present application. The battery may be the battery 100 provided in each of the above embodiments, and as shown in Figure 10, the battery manufacturing apparatus 400 may include a providing module 410.

The provision module 410 is used to provide a battery cell 20, and a pressure relief mechanism 213 is installed in the battery cell 20, and the pressure relief mechanism 213 is used to release the internal pressure by being activated when the internal pressure or temperature of the battery cell 20 reaches a threshold value.

The provision module 410 is further used to provide a bus bar 12 for electrical connection to the battery cell 20.

The provision module 410 is further used to provide an electrical cavity 11a for accommodating the battery cells 20 and the busbars 12.

The providing module 410 is further used to provide a collection cavity 11b for collecting discharge from the battery cell 20 when the pressure relief mechanism 213 is activated.

The providing module 410 is further installed in the air flow passage formed between the pressure relief mechanism 213 and the wall of the electrical cavity 11a, and is used to provide a sealing structure 215 to prevent emissions from reaching the busbar 12 when the pressure relief mechanism 213 is activated.

Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and equivalents may be substituted for components therein without departing from the scope of the present application. In particular, the technical features described in the embodiments may be combined in any manner, provided there is no structural contradiction. The present application is not limited to the specific embodiments disclosed in the specification, but includes all technical solutions falling within the scope of the claims.

1 Vehicle 11 Electrical cavity 12 Bus bar 13 Isolation member 20 Battery cell 21 First wall 22 Electrode assembly 221a First tab 222a Second tab 23 Connection member 24 Spacer 30 Battery module 40 Housing 41 Surrounding wall 42 Housing upper cover 43 Housing lower cover 44 Partition beam 60 Controller 80 Motor 100 Battery 111 First part 112 Second part 211 Case 212 Cover plate 213 Pressure release mechanism 214 Electrode terminal 214a Positive electrode terminal 214b Negative electrode terminal 215 Seal structure 215a First seal member 215b Second seal member 215 is a bottom completely covered seal structure 400 Battery manufacturing apparatus 410 Provision module

Claims (14)

A battery (100),
A battery cell (20) having a pressure relief mechanism (213) installed therein, the pressure relief mechanism (213) being installed on a first wall of the battery cell (20) and being activated when an internal pressure or temperature of the battery cell (20) reaches a threshold value, thereby releasing the internal pressure;
A bus bar (12) for electrically connecting to the battery cell (20);
an electrical cavity (11a) for accommodating the battery cells (20) and the busbars (12);
a collection cavity (11b) for collecting discharge from the battery cell (20) when the pressure relief mechanism (213) is activated;
an isolating member (13) for isolating the electrical cavity (11a) and the collecting cavity (11b);
a partition beam (44) for dividing the electrical cavity (11a) into a plurality of receiving cavities (11c);
a seal structure (215) disposed in an airflow passage formed between the pressure relief mechanism (213) and a wall of the electrical cavity (11a) for preventing the exhaust from reaching the busbar (12) when the pressure relief mechanism (213) is activated ;
The sealing structure (215) includes a first sealing member (215a) disposed between the first wall and the isolation member (13);
The sealing structure (215) further includes a second sealing member (215b) installed between a side wall of the accommodating cavity (11c) and a second wall of the battery cell (20), the second wall being installed across the first wall of the battery (100). The battery (100) of claim 1, wherein the sealing structure (215) is installed to surround at least the outer periphery of the pressure relief mechanism (213) to prevent the discharged matter from reaching the busbar (12) when the pressure relief mechanism (213) is activated. 3. The battery (100) according to claim 1 or 2, wherein the isolating member (13) is configured as a wall shared by the electrical cavity (11a) and the collecting cavity (11b). 4. The battery (100) of claim 3, wherein the first seal member (215a) has a through hole at a position corresponding to the pressure relief mechanism (213), and when the pressure relief mechanism (213) is activated, the discharged matter passes through the through hole, passes through the isolation member (13), and enters the collection cavity (11b). The battery (100) according to claim 4, wherein the first sealing member (215a) is a frame-type structure having one through hole, the battery cells (20) are installed in multiple locations, and the one through hole corresponds to the pressure relief mechanisms (213) of the multiple battery cells. The battery (100) according to claim 4, wherein the first seal member (215a) has a lattice structure having a plurality of through holes, a plurality of the battery cells (20) are installed, and the plurality of through holes correspond one-to-one to the pressure relief mechanisms (213) of the plurality of the battery cells. 10. The battery (100) of claim 1 , wherein the first sealing member (215a) is a gasket or sealant and/or the second sealing member (215b) is a gasket or sealant. The battery (100) according to claim 7 , wherein a side wall of the receiving cavity (11c) is provided with an adhesive injection hole for injecting the sealant. 8. The battery (100) of claim 7 , wherein a surface of the gasket is coated or spray-painted with a material having a melting point higher than the temperature of the effluent. The battery (100) of claim 1 , wherein the first seal member (215a) and the second seal member (215b) are integrally molded. The battery (100) of any one of claims 1 to 10 , wherein the melting point of the sealing structure (215) is higher than the temperature of the effluent. A power consuming device, comprising a battery (100) according to any one of claims 1 to 11 , said battery (100) being adapted to provide electrical energy to said power consuming device. A method for manufacturing a battery (100), comprising the steps of:
providing a battery cell (20) having a pressure relief mechanism (213) installed thereon, the pressure relief mechanism (213) being installed on a first wall of the battery cell (20) and adapted to be activated to release the internal pressure when the internal pressure or temperature of the battery cell (20) reaches a threshold value;
providing a busbar (12) for electrically connecting to the battery cells (20);
providing an electrical cavity (11a) for accommodating the battery cells (20) and the busbars (12);
providing a collection cavity (11b) for collecting exhaust from the battery cell (20) when the pressure relief mechanism (213) is activated;
providing an isolation member (13) for isolating said electrical cavity (11a) and said collection cavity (11b);
providing a partition beam (44) for partitioning said electrical cavity (11a) into a number of receiving cavities (11c);
providing a sealing structure (215) disposed in an airflow passage formed between the pressure relief mechanism (213) and a wall of the electrical cavity (11a) for preventing the exhaust from reaching the busbar (12) when the pressure relief mechanism (213) is activated ;
The sealing structure (215) includes a first sealing member (215a) disposed between the first wall and the isolation member (13);
The method for manufacturing a battery (100), wherein the sealing structure (215) further includes a second sealing member (215b) installed between a side wall of the accommodating cavity (11c) and a second wall of the battery cell (20), the second wall being installed intersecting the first wall . An apparatus for manufacturing a battery (100), comprising:
A battery cell (20) having a pressure relief mechanism (213) installed therein, the pressure relief mechanism (213) being installed on a first wall of the battery cell (20) and being adapted to release the internal pressure by being activated when the internal pressure or temperature of the battery cell (20) reaches a threshold value;
providing a bus bar (12) for electrically connecting to the battery cells (20);
providing an electrical cavity (11a) for accommodating the battery cells (20) and the busbars (12);
providing a collection cavity (11b) for collecting discharge from the battery cell (20) when the pressure relief mechanism (213) is activated;
providing an isolation member (13) for isolating said electrical cavity (11a) and said collection cavity (11b);
providing a partition beam (44) for partitioning said electrical cavity (11a) into a number of receiving cavities (11c);
and providing a sealing structure (215) for preventing the exhaust from reaching the busbar (12) when the pressure relief mechanism (213) is activated, the sealing structure (215) being disposed in an airflow passage formed between the pressure relief mechanism (213) and a wall of the electrical cavity (11a);
The sealing structure (215) includes a first sealing member (215a) disposed between the first wall and the isolation member (13);
The sealing structure (215) further includes a second sealing member (215b) installed between a side wall of the accommodating cavity (11c) and a second wall of the battery cell (20), the second wall being installed intersecting the first wall .

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